Handle refund error

README.md

@@ -19,6 +19,8 @@ Note: the mobile app requires the latest version of the web app.
 - Run `cp android/app/build.gradle.dev android/app/build.gradle` to support running the code unsigned.
 - Run `flutter run` while you have a device connected to the computer or an emulator running and now you can run it.
 
+Note: if you don't have an Invoice Ninja backend you can set DEMO_MODE to true in lib/.env.dart to run the app offline. 
+
 ## Application Architecture
 
 The application was created using the [Flutter Redux Starter](https://github.com/hillelcoren/flutter-redux-starter).

lib/ui/payment/edit/payment_edit.dart

@@ -340,6 +340,7 @@ class _PaymentableEditorState extends State<PaymentableEditor> {
     final localization = AppLocalization.of(context);
 
     return Row(
+      crossAxisAlignment: CrossAxisAlignment.start,
       children: <Widget>[
         if (widget.entityType == EntityType.invoice)
           Expanded(

lib/ui/payment/refund/payment_refund.dart

@@ -291,6 +291,7 @@ class _PaymentableEditorState extends State<PaymentableEditor> {
     final hasMultipleInvoices = payment.invoicePaymentables.length > 1;
 
     return Row(
+      crossAxisAlignment: CrossAxisAlignment.start,
       children: <Widget>[
         Expanded(
           child: EntityDropdown(